基体界面屈服强度和残余应力失配对界面裂纹扩展的影响

对基体界面屈服强度和残余应力失配情况下的界面裂纹扩展机制进行了力学理论分析,并通过位错与裂纹的关系理论计算了界面裂纹尖端塑性区尺寸。结果表明:当界面裂纹由低强度区向高强度区扩展时,高强度区的残余压应力和屈服强度减少了裂纹尖端的塑性区长度和裂纹尖端张开位移,从而起到了抑制界面裂纹扩展的作用。     

CMC在珠光颜料涂布纸中的应用试验

对添加羧甲基纤维素钠改善水性珠光涂布纸云母系列珠光涂料的性质做了初步研究．试验结果表明，羧甲基纤维素钠不仅能改善涂料的稳定性，提高涂层的表面拉毛强度，还能起到辅助胶粘剂的作用．通过优化试验得到了较理想的羧甲基纤维素钠配比．     

陶瓷／金属梯度热障涂层的制备及性能评价

为了评价陶瓷／金属梯度热障涂层的性能，设计了4种涂层方案和2种基体材料（1Cr18Ni9Ti和2Cr13）．利用单枪单送粉器成功地制备了线性梯度涂层．通过观察涂层的微观结构、测量涂层的抗热震性能和热残余应力来评价涂层的性能．利用扫描电镜对各种陶瓷涂层的微观结构进行了观察和分析，利用X射线能谱分析得到了陶瓷梯度涂层试样中的不同区域的衍射图．热震试验表明，梯度涂层比非梯度涂层具有更好的抗热震性能．采用钻孔法对不同涂层方案进行了残余应力的测量，结果表明，压应力出现在1Cr18Ni9Ti基体材料上，而拉应力出现在2Cr13基体材料上．     

连铸结晶器表面强化层的研究现状和发展趋势

钢铁连铸结晶器作为连铸机的核心部件，其工作的可靠性、稳定性和耐用性便成为人们十分关心的问题。人们采用电镀、热喷涂等表面强化处理技术在结晶器表面制备一层保护层，以延长结晶器的使用寿命。阐述了结晶器表面强化技术的研究现状，并展望了结晶器的表面强化技术。     

料浆法氧化铝基陶瓷涂层的制备及性能研究

采用自制的磷酸铝粘结剂和一定比例的陶瓷骨料在1Cr18Ni9上用料浆法制备氧化铝基陶瓷涂层。试验结果表明：涂层较致密，涂层与基体结合强度较好；涂层可提高1Cr18Ni9钢在碱和盐溶液中的抗侵蚀能力。     

Effects of a base coating used for electropolymerization of poly(3,4-ethylenedioxythiophene) on indium tin oxide electrode

Electropolymerization of poly(3,4-ethylenedioxythiophene) (PEDOT) films on indium tin oxide (ITO), using a very thin PEDOT:poly(styrene sulfonate) (PEDOT:PSS) film as a base coating, was carried out in a non-aqueous solution containing the monomer, an electrolyte and propylene carbonate by a two-electrode system. For comparison, PEDOT film electrodeposited on bare ITO substrate under the same condition was also presented. The PEDOT films deposited on these two substrates were characterized by scanning electron microscopy, energy disperse X-ray spectroscopy and Raman spectroscopy. The results indicate that the PEDOT film electrodeposited on bare ITO was not uniform, while the PEDOT film electrodeposited on PEDOT:PSS/ITO has better uniformity. The compositions of the different regions of PEDOT film electrodeposited on bare ITO and PEDOT:PSS/ITO were studied and discussed. Electrochromic devices (ECDs) based on PEDOT films electrodeposited on bare ITO and PEDOT:PSS/ITO were fabricated and characterized by UV-Vis-NIR spectrophotometric study. The results show that the display contrast of the ECD based on PEDOT film electrodeposited on PEDOT:PSS/ITO was improved over that on a bare ITO substrate.     

Wear behavior of low-pressure plasma-sprayed AlCuFe quasicrystalline coating on titanium alloy

The wear-resistant AlCuFe quasicrystalline coating was fabricated on substrate of titanium alloy by low-pressure plasma-spraying (LPPS) method. The LPPS AlCuFe quasicrystalline coating has a rapidly solidified lamellar microstructure consisting of mainly icosahedral phase and small amount of cubic phase peaks. The results showed that AlCuFe quasicrystalline coating improved the wear resistance of titanium-based alloys under dry sliding wear test conditions. The excellent wear resistance may be attributed to the high hardness of AlCuFe quasicrystal and the formation of the tribofilm.     

Solid-state interfacial reactions and compound morphology of cBN grain and surface Ti coating

In order to research thoroughly the mechanism of the solid-state interfacial reactions and the induced compound morphology of cubic boron nitride (cBN) abrasive grains and the surface Ti-coating layer, annealing experiments of Ti-coated cBN grains were conducted at different temperatures of 550-950 °C for dwell times of 60 min under high-vacuum conditions. The corresponding interfacial characteristics were investigated by differential thermal analysis, X-ray diffraction and scanning electron microscopy. The results show that the relevant interfacial reactions and compound morphology between cBN and Ti are significantly influenced by the heat-treatment temperature. No reaction occurs below 550 °C, and TiN is the sole reaction product during heating from 650-750 °C. Three kinds of compounds, TiN, TiB₂ and TiB, can exist in the interfacial region at 950 °C. Here, the favorable interfacial structures, cBN/TiB₂/TiB/(TiB+TiN)/TiN/Ti, are developed for the excellent mechanical and chemical transition effects between cBN grains and Ti coating. The thermodynamic analysis finally predicts that there is a reasonable probability for the formation of such a special interfacial transition layer.     

镍镀层与黄铜抗冲刷腐蚀性能比较研究

利用自制的汽轮机凝汽器铜管模拟试验装置,进行Ni P、Ni W镀层与黄铜HSn70 1A模拟管端冲刷腐蚀试验。结果表明,黄铜管管端采用Ni P、Ni W镀层可防止冲刷腐蚀,显著提高黄铜管抗冲刷腐蚀能力和使用寿命。与HSn70 1A黄铜管段试样相比,Ni W镀层可提高抗冲刷腐蚀能力近5倍,Ni P镀层可提高抗冲刷腐蚀能力3倍多。     

RTV防污闪涂料在输电线路及变电站的应用

近几年电力系统污闪事故时有发生，对供电的可靠性造成威胁。从各种防污措施的比较，说明了新型防污涂料RTV和PRTV的使用价值，及由此产生的社会经济效益。